Air-conditioning unit



FIG. 1 is a first perspective view of an air-conditioning unit design;

FIG. 2 is a second perspective view of the design of FIG. 1;

FIG. 3 is a top plan view of the design of FIG. 1;

FIG. 4 is a bottom plan view of the design of FIG. 1;

FIG. 5 is a first side view of the design of FIG. 1;

FIG. 6 is a second side view of the design of FIG. 1;

FIG. 7 is a rear elevation view of the design of FIG. 1; and,

FIG. 8 is a front elevation view of the design of FIG. 1.

The broken lines illustrating portions of the air-conditioning unit form no part of the claimed design. 

CLAIM The ornamental design for an air-conditioning unit, as shown and described. 